Propagation: Should I sow seeds in winter or spring?, 1 by NancyGroutsis

NancyGroutsis wrote:
I'd like to sow some grass or flower seeds on muddy soil and I've read that they should be sown in the winter but others say to sow seeds in spring. My only experience is sowing Canada Green grass in the soil outdoors and indoors in a pot which is now outside (attached photo). I mixed 2 parts soil and 1 part seed and put a 1/8 inch layer on top of tilled soil and added 1/8 inch soil on top. During summer and autumn the grass sprouts in 3 days and the blades are 1 inch high by the 6th day.

I'm considering planting sedge in the muddy shaded area or perhaps a flower. I don't want to propagate the seeds indoors. Does anyone have experience with sowing seeds in a cold climate woodland bog?

DoGooder